Load Specifications
Load data in caliber 8 x 64 with .321 | 165gr | Hornady FTX bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Alliant Reloder-17.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 52,663 psi | 90% | 2736 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 51,198 psi | 87% | 2756 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 49,951 psi | 85% | 2749 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 52,446 psi | 89% | 2812 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 53,069 psi | 90% | 2831 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,078 psi | 77% | 2766 fps | 96.4% |
| Accurate LT-30 | <<locked>> | 82% | 52,649 psi | 90% | 2684 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 53,040 psi | 90% | 2707 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 51,735 psi | 88% | 2812 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 96% | 52,808 psi | 90% | 2808 fps | 98.4% |
| ADI AR 2219 | <<locked>> | 82% | 52,910 psi | 90% | 2799 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 51,285 psi | 87% | 2776 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 88% | 50,647 psi | 86% | 2766 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 52,315 psi | 89% | 2874 fps | 99.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 51,068 psi | 87% | 2910 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 51,866 psi | 88% | 2831 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 84% | 52,779 psi | 90% | 2746 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 52,562 psi | 89% | 2848 fps | 98.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,295 psi | 77% | 2776 fps | 96.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 52,402 psi | 89% | 2936 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 51,721 psi | 88% | 2680 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 51,358 psi | 87% | 2822 fps | 97.8% |
| Bofors RP3 | <<locked>> | 96% | 52,083 psi | 89% | 2841 fps | 99.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 50,169 psi | 85% | 2713 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 90% | 53,127 psi | 90% | 2851 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 86% | 51,242 psi | 87% | 2884 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 84% | 51,779 psi | 88% | 2782 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 52,779 psi | 90% | 2805 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 50,154 psi | 85% | 2792 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 90% | 52,141 psi | 89% | 2825 fps | 99.2% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,379 psi | 70% | 2661 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 50,749 psi | 86% | 2851 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,693 psi | 59% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 50,517 psi | 86% | 2779 fps | 98.9% |
| IMR 3031 | <<locked>> | 90% | 51,401 psi | 88% | 2822 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 52,098 psi | 89% | 2792 fps | 98.5% |
| IMR 4198 | <<locked>> | 84% | 53,142 psi | 90% | 2710 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,149 psi | 73% | 2710 fps | 96% |
| IMR 4895 | <<locked>> | 92% | 50,778 psi | 86% | 2828 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 88% | 51,285 psi | 87% | 2776 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 84% | 51,039 psi | 87% | 2759 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 90% | 50,589 psi | 86% | 2792 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 52,199 psi | 89% | 2749 fps | 98.8% |
| Lovex S062 | <<locked>> | 94% | 51,735 psi | 88% | 2795 fps | 99.6% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,763 psi | 86% | 2772 fps | 96.1% |
| Norma 201 | <<locked>> | 90% | 50,647 psi | 86% | 2766 fps | 99.4% |
| Norma 202 | <<locked>> | 90% | 50,966 psi | 87% | 2776 fps | 100% |
| Norma 203B | <<locked>> | 94% | 51,721 psi | 88% | 2835 fps | 98.8% |
| Norma URPᴾ | <<locked>> | 100% | 45,339 psi | 77% | 2766 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 94% | 52,112 psi | 89% | 2858 fps | 98.7% |
| Ramshot TAC | <<locked>> | 88% | 51,735 psi | 88% | 2779 fps | 96.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 50,734 psi | 86% | 2802 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 52,533 psi | 89% | 2776 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,795 psi | 59% | 1755 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 50,879 psi | 87% | 2762 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 52,286 psi | 89% | 2910 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 52,112 psi | 89% | 2943 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,049 psi | 77% | 2785 fps | 96% |
| Rottweil R 901 | <<locked>> | 88% | 51,750 psi | 88% | 2759 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 51,068 psi | 87% | 2762 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 98% | 51,590 psi | 88% | 2828 fps | 99.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,763 psi | 86% | 2772 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 90% | 50,589 psi | 86% | 2792 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 51,735 psi | 88% | 2795 fps | 99.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 50,676 psi | 86% | 2730 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 50,256 psi | 86% | 2838 fps | 98.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 50,401 psi | 86% | 2720 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 52,953 psi | 90% | 2805 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 50,125 psi | 85% | 2782 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 52,823 psi | 90% | 2720 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 52,344 psi | 89% | 2717 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 52,170 psi | 89% | 2808 fps | 99.7% |
| Somchem S335 | <<locked>> | 90% | 51,866 psi | 88% | 2720 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 52,460 psi | 89% | 2805 fps | 98.8% |
| Somchem S355 | <<locked>> | 98% | 52,446 psi | 89% | 2828 fps | 99.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,306 psi | 69% | 2710 fps | 98.3% |
| Vihtavuori N130 | <<locked>> | 86% | 52,707 psi | 90% | 2697 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 52,750 psi | 90% | 2713 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 49,980 psi | 85% | 2743 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 51,329 psi | 87% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 50,546 psi | 86% | 2766 fps | 99.7% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,776 psi | 81% | 2766 fps | 96.7% |
| Vihtavuori N530 | <<locked>> | 88% | 51,547 psi | 88% | 2772 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 94% | 52,823 psi | 90% | 2795 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,876 psi | 80% | 2769 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,023 psi | 83% | 2756 fps | 98.8% |
| Winchester 748 | <<locked>> | 88% | 50,502 psi | 86% | 2815 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 92% | 53,156 psi | 90% | 2844 fps | 99.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 41,205 psi | 70% | 2552 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,614 psi | 76% | 2648 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 33,663 psi | 57% | 2457 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 39,827 psi | 68% | 2595 fps | 99% |
| Accurate 4064 | <<locked>> | 80% | 31,821 psi | 54% | 2434 fps | 98.1% |
| Accurate 4350 | <<locked>> | 98% | 42,177 psi | 72% | 2710 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 49,588 psi | 84% | 2638 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,937 psi | 85% | 2661 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 37,768 psi | 64% | 2546 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 86% | 38,740 psi | 66% | 2549 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 49,472 psi | 84% | 2746 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,755 psi | 68% | 2566 fps | 97.6% |
| Alliant AR-Comp | <<locked>> | 80% | 38,711 psi | 66% | 2575 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,876 psi | 78% | 2759 fps | 98.4% |
| Alliant Power Pro 2000-MR | 53.2 gr | 86% | 41,727 psi | 71% | 2723 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 33,286 psi | 57% | 2464 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,659 psi | 79% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 38,305 psi | 65% | 2579 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 98% | 42,656 psi | 73% | 2720 fps | 95.6% |
| Alliant Reloder-17 | 54.8 gr | 90% | 37,594 psi | 64% | 2638 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,631 psi | 83% | 2635 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 42,076 psi | 72% | 2654 fps | 95.7% |
| Bofors RP3 | <<locked>> | 82% | 32,576 psi | 55% | 2461 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,858 psi | 71% | 2566 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,768 psi | 64% | 2572 fps | 97.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,510 psi | 71% | 2703 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 80% | 45,440 psi | 77% | 2680 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,064 psi | 78% | 2700 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 44,179 psi | 75% | 2687 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 38,043 psi | 65% | 2559 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 36,593 psi | 62% | 2556 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,040 psi | 58% | 2513 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,570 psi | 44% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,738 psi | 63% | 2516 fps | 95.9% |
| IMR 3031 | <<locked>> | 80% | 36,985 psi | 63% | 2572 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 38,232 psi | 65% | 2533 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 47,210 psi | 80% | 2621 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 40,553 psi | 69% | 2657 fps | 95.2% |
| IMR 4895 | <<locked>> | 82% | 36,854 psi | 63% | 2559 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 39,755 psi | 68% | 2566 fps | 97.6% |
| Lovex D073.5 | <<locked>> | 80% | 44,527 psi | 76% | 2651 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 36,027 psi | 61% | 2526 fps | 98.2% |
| Lovex S060 | <<locked>> | 80% | 38,682 psi | 66% | 2500 fps | 96% |
| Lovex S062 | <<locked>> | 80% | 33,518 psi | 57% | 2438 fps | 95.8% |
| Lovex S065 | <<locked>> | 98% | 47,587 psi | 81% | 2717 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 37,101 psi | 63% | 2507 fps | 97% |
| Norma 202 | <<locked>> | 80% | 37,173 psi | 63% | 2526 fps | 99% |
| Norma 203B | <<locked>> | 84% | 37,623 psi | 64% | 2569 fps | 95.7% |
| Norma URP | <<locked>> | 98% | 42,409 psi | 72% | 2707 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 84% | 37,217 psi | 63% | 2575 fps | 95.2% |
| Ramshot TAC | <<locked>> | 84% | 45,411 psi | 77% | 2667 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,725 psi | 66% | 2575 fps | 95.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,047 psi | 73% | 2608 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,759 psi | 44% | 1568 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,628 psi | 76% | 2654 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 39,697 psi | 68% | 2674 fps | 95.6% |
| ReloadSwiss RS 60 | 49.9 gr | 82% | 30,806 psi | 52% | 2470 fps | 95.5% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 42,148 psi | 72% | 2726 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 40,828 psi | 70% | 2566 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 35,389 psi | 60% | 2461 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 86% | 35,027 psi | 60% | 2513 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 47,587 psi | 81% | 2717 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,027 psi | 61% | 2526 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 33,518 psi | 57% | 2438 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,108 psi | 80% | 2671 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 38,754 psi | 66% | 2615 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,340 psi | 81% | 2674 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 43,163 psi | 73% | 2635 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,303 psi | 62% | 2510 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,769 psi | 66% | 2484 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,778 psi | 54% | 2346 fps | 98.6% |
| Somchem S321 | <<locked>> | 80% | 42,772 psi | 73% | 2644 fps | 98.5% |
| Somchem S335 | <<locked>> | 80% | 38,232 psi | 65% | 2487 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 37,405 psi | 64% | 2530 fps | 95.4% |
| Somchem S355 | <<locked>> | 86% | 36,042 psi | 61% | 2520 fps | 95.7% |
| Somchem S365 | <<locked>> | 92% | 31,372 psi | 53% | 2487 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 43,947 psi | 75% | 2562 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,841 psi | 66% | 2487 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,098 psi | 58% | 2461 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 35,012 psi | 60% | 2461 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 30,226 psi | 51% | 2359 fps | 95.1% |
| Vihtavuori N160 | <<locked>> | 96% | 42,003 psi | 72% | 2661 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 39,639 psi | 67% | 2559 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 80% | 33,649 psi | 57% | 2441 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 98% | 43,859 psi | 75% | 2713 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 35,360 psi | 60% | 2484 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 38,595 psi | 66% | 2598 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,360 psi | 60% | 2510 fps | 95.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 88 powders for 8 x 64 loaded with the .321 | 165gr | Hornady FTX. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,943 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,943 fps. Accurate 4350 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 8 x 64 with the .321 | 165gr | Hornady FTX they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.